In lecture, I indicated that the remaining sections of Lecture 18 would be taught through posted recordings, as a substitute for our lack of a lecture during Retake A. Well, here they are! Please watch them before the lecture following Retake A.
First is Lec18Ex4, where we introduce strategy of changing the order of integration, to compute an initially concerning double integral.
Last is Lec18Ex5, where we change the order of integration one more time, as additional practice.